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    Wyświetlanie 1-9 z 9
    Tytuł:
    Adult stem cells: hopes and hypes of regenerative medicine
    Autorzy:
    Dulak, Józef
    Szade, Krzysztof
    Szade, Agata
    Nowak, Witold
    Józkowicz, Alicja
    Powiązania:
    https://bibliotekanauki.pl/articles/1038957.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    embryonic stem cells
    induced pluripotent stem cells
    myocardial infarction
    very small embryonic-like stem cells
    heme oxygenase-1
    Opis:
    Stem cells are self-renewing cells that can differentiate into specialized cell type(s). Pluripotent stem cells, i.e. embryonic stem cells (ESC) or induced pluripotent stem cells (iPSC) differentiate into cells of all three embryonic lineages. Multipotent stem cells, like hematopoietic stem cells (HSC), can develop into multiple specialized cells in a specific tissue. Unipotent cells differentiate only into one cell type, like e.g. satellite cells of skeletal muscle. There are many examples of successful clinical applications of stem cells. Over million patients worldwide have benefited from bone marrow transplantations performed for treatment of leukemias, anemias or immunodeficiencies. Skin stem cells are used to heal severe burns, while limbal stem cells can regenerate the damaged cornea. Pluripotent stem cells, especially the patient-specific iPSC, have a tremendous therapeutic potential, but their clinical application will require overcoming numerous drawbacks. Therefore, the use of adult stem cells, which are multipotent or unipotent, can be at present a more achievable strategy. Noteworthy, some studies ascribed particular adult stem cells as pluripotent. However, despite efforts, the postulated pluripotency of such events like "spore-like cells", "very small embryonic-like stem cells" or "multipotent adult progenitor cells" have not been confirmed in stringent independent studies. Also plasticity of the bone marrow-derived cells which were suggested to differentiate e.g. into cardiomyocytes, has not been positively verified, and their therapeutic effect, if observed, results rather from the paracrine activity. Here we discuss the examples of recent studies on adult stem cells in the light of current understanding of stem cell biology.
    Źródło:
    Acta Biochimica Polonica; 2015, 62, 3; 329-337
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stem cell biology - a never ending quest for understanding.
    Autorzy:
    Majka, Marcin
    Kucia, Magdalena
    Ratajczak, Mariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1041413.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    stem cells
    TCSC
    plasticity
    Opis:
    Stem cells (SC) research is an important part of biotechnology that could lead to the development of new therapeutic strategies. A lot of effort has been put to understand biology of the stem cells and to find genes and subsequently proteins that are responsible for their proliferation, self-renewal and differentiation. Different cytokines and growth factors has been used to expand stem cells, but no combination of these factors was identified that could effectively expand the most primitive stem cells. Recently, however, genes and receptors responsible for SC proliferation and differentiation have been described. Ligands for these receptors or these genes themselves are being already used for ex vivo expansion of stem cells and the first data are very promising. New markers, such as CXCR4 and CD133, have been discovered and shown to be present on surface of hematopoietic stem cells. The same markers were recently also found to be expressed on neuronal-, hepatic- or skeletal muscle-stem cells. By employing these markers several laboratories are trying to isolate stem cells for potential clinical use. New characteristics of stem cells such as transdifferentiation and cell fusion have been described. Our team has identified a population of tissue committed stem cells (TCSC). These cells are present in a bone marrow and in other tissues and they can differentiate into several cell types including cardiac, neural and liver cells.
    Źródło:
    Acta Biochimica Polonica; 2005, 52, 2; 353-358
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Leukemic stem cells: from metabolic pathways and signaling to a new concept of drug resistance targeting
    Autorzy:
    Styczynski, Jan
    Drewa, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1040856.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    stem cell markers
    metabolic pathways
    drug resistance
    leukemic stem cells
    cancer stem cells
    Opis:
    Cancer stem cells are a small subset of cancer cells constituting a reservoir of self-sustaining cells with the exclusive ability to self-renew and maintain the tumor. These cells are identified by specific stem cell markers: antigens, molecules and signaling pathways. Transcription factors and molecules associated with oncogenesis, such as NF-κB, Bmi-1, Notch, WNT beta-catenin, Sonic hedgehog and their biochemical pathways, active only in a small minority of cancer cells might play key roles in determining the biology and the overall long-term behavior of a tumor. The molecules and pathways specific for cancer stem cells, which contribute to their drug resistance, are potential targets for new therapeutic strategies.
    Źródło:
    Acta Biochimica Polonica; 2007, 54, 4; 717-726
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Osteogenic differentiation of human mesenchymal stem cells from adipose tissue and Whartons jelly of the umbilical cord
    Autorzy:
    Zajdel, Alicja
    Kałucka, Magdalena
    Kokoszka-Mikołaj, Edyta
    Wilczok, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/1038664.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    adipose derived mesenchymal stem cells
    Wharton's jelly derived mesenchymal stem cells
    osteogenic differentiation
    Opis:
    Induced osteogenesis of mesenchymal stem cells (MSCs) may provide an important tool for bone injuries treatment. Human umbilical cord and adipose tissue are routinely discarded as clinical waste and may be used as noncontroversial MSCs sources. It still remains to be verified which source of MSCs is the most suitable for bone regeneration. The aim of this research was to investigate the osteogenic potential of human MSCs derived from adipose tissue (AT-MSCs) and Wharton's jelly of the human umbilical cord (WJ-MSCs) differentiated under the same conditions. Osteogenic differentiation of MSCs was detected and quantified by alizarin red S (ARS) staining for calcium deposition and alkaline phosphatase (ALP) activity, osteoprotegerin (OPG), and osteocalcin (OC) secretion measurements. Under osteogenic conditions, after 21 days of differentiation, the measured ALP activity and calcium deposition were significantly higher in the AT-MSCs than in the WJ-MSCs, while the OPG and OC secretion were higher in the WJ-MSCs vs. AT-MSCs. Low concentrations of OPG and high levels of OC in AT-MSCs and WJ-MSCs, prove that these cells reached an advanced stage of the osteogenic differentiation. The levels of OC secreted by AT-MSCs were lower than by WJ-MSCs. Both cell types, AT-MSCs and WJ-MSCs possess a potential to differentiate towards the osteogenic lineage. The observed differences in the levels of osteogenic markers suggest that after 21-days of osteogenic differentiation, the AT-MSCs might have reached a more advanced stage of differentiation than WJ-MSCs.
    Źródło:
    Acta Biochimica Polonica; 2017, 64, 2; 365-369
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Regulatory RNAs in Planarians
    Autorzy:
    Pawlicka, Kamila
    Perrigue, Patrick
    Barciszewski, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/1038722.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    planarians
    RNAi
    miRNA
    regeneration
    stem cells
    Opis:
    The full scope of regulatory RNA evolution and function in epigenetic processes is still not well understood. The development of planarian flatworms to be used as a simple model organism for research has shown a great potential to address gaps in the knowledge in this field of study. The genomes of planarians encode a wide array of regulatory RNAs that function in gene regulation. Here, we review planarians as a suitable model organism for the identification and function of regulatory RNAs.
    Źródło:
    Acta Biochimica Polonica; 2016, 63, 4; 681-686
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of substrate stiffness on differentiation of umbilical cord stem cells
    Autorzy:
    Witkowska-Zimny, Małgorzata
    Walenko, Katarzyna
    Wałkiewicz, Anna
    Pojda, Zygmunt
    Przybylski, Jacek
    Lewandowska-Szumieł, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/1039745.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    substrate stiffness
    osteogenic differentiation
    umbilical cord mesenchymal stromal/stem cells
    Opis:
    Tissue formation and maintenance is regulated by various factors, including biological, physiological and physical signals transmitted between cells as well as originating from cell-substrate interactions. In our study, the osteogenic potential of mesenchymal stromal/stem cells isolated from umbilical cord Wharton's jelly (UC-MSCs) was investigated in relation to the substrate rigidity on polyacrylamide hydrogel (PAAM). Osteogenic differentiation of UC-MSCs was enhanced on stiff substrate compared to soft substrates, illustrating that the mechanical environment can play a role in differentiation of this type of cells. These results show that substrate stiffness can regulate UC-MSCs differentiation, and hence may have significant implications for design of biomaterials with appropriate mechanical properties for regenerative medicine.
    Źródło:
    Acta Biochimica Polonica; 2012, 59, 2; 261-264
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Overexpression of ID1 reverses the repression of human dental pulp stem cells differentiation induced by TWIST1 silencing
    Autorzy:
    Maciejewska, Izabela
    Sakowicz-Burkiewicz, Monika
    Krzeminska, Marta
    Pawelczyk, Tadeusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1038544.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    dental pulp stem cells
    TWIST1
    ID1
    odontoblast differentiation
    DSPP
    DMP1
    Opis:
    Multiple studies showed that the cessation of TWIST1 expression is the prerequisite for osteoblasts' maturation. However, recent reports revealed that the function of TWIST1 is different in the dental pulp stem cells (DPSCs), where a high level of TWIST1 expression promoted DPSCs' differentiation. The aim of the study was to investigate the impact of TWIST1 and ID1 on the differentiation process in the human DPSCs. Methods: TWIST1 and ID1 expression in the DSPCs was modulated by lentivirus transduction. Genes expression was assessed with qRT-PCR. The proteins level was evaluated by Western blot. The DPSCs differentiation was assessed with the proliferation, alkaline phosphatase (ALP) activity, and calcium concentration assays. Results: TWIST1 silencing suppressed the expression of ID1 and both the early and late markers of odontoblasts' differentiation detected at the transcript and protein level. The forced overexpression of ID1 increased the expression of the late markers of odontoblasts differentiation but diminished the expression of the early markers. DPCSs with the silenced TWIST1 and subsequent ID1 overexpression displayed an increase in the expression of the late markers of odontoblasts differentiation. Cells with silenced TWIST1 and overexpressing ID1 had increased activity of ALP, higher calcium concentration and decreased proliferation rate. The high level of ID1 expression might be a critical factor stimulating DPSCs differentiation and it might compensate the repressed differentiation of DPSCs caused by TWIST1 silencing. Conclusion: The mutual correlation between the expression level of TWIST1 and ID1 might be a critical factor driving the process of the human odontoblasts' differentiation.
    Źródło:
    Acta Biochimica Polonica; 2017, 64, 4; 615-619
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Growth suppression of human breast carcinoma stem cells by lipid peroxidation product 4-hydroxy-2-nonenal and hydroxyl radical-modified collagen
    Autorzy:
    Cipak, Ana
    Mrakovcic, Lidija
    Ciz, Milan
    Lojek, Antonin
    Mihaylova, Boryana
    Goshev, Ivan
    Jaganjac, Morana
    Cindric, Marina
    Sitic, Sanda
    Margaritoni, Marko
    Waeg, Georg
    Balic, Marija
    Zarkovic, Neven
    Powiązania:
    https://bibliotekanauki.pl/articles/1040399.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    collagen
    4-hydroxynonenal
    breast cancer stem cells
    extracellular matrix
    oxidative homeostasis
    SUM159
    Opis:
    Breast cancer is a leading cause of mortality and morbidity in women, mostly due to high metastatic capacity of mammary carcinoma cells. It has been revealed recently that metastases of breast cancer comprise a fraction of specific stem-like cells, denoted as cancer stem cells (CSCs). Breast CSCs, expressing specific surface markers CD44+CD24-/lowESA+ usually disseminate in the bone marrow, being able to spread further and cause late metastases. The fundamental factor influencing the growth of CSCs is the microenvironment, especially the interaction of CSCs with extracellular matrix (ECM). The structure and function of ECM proteins, such as the dominating ECM protein collagen, is influenced not only by cancer cells but also by various cancer treatments. Since surgery, radio and chemotherapy are associated with oxidative stress we analyzed the growth of breast cancer CD44+CD24-/lowESA+ cell line SUM159 cultured on collagen matrix in vitro, using either native collagen or the one modified by hydroxyl radical. While native collagen supported the growth of CSCs, oxidatively modified one was not supportive. The SUM159 cell cultures were further exposed to a supraphysiological (35 µM) dose of the major bioactive lipid peroxidation product 4-hydroxynonenal (HNE), a well known as 'second messenger of free radicals', which has a strong affinity to bind to proteins and acts as a cytotoxic or as growth regulating signaling molecule. Native collagen, but not oxidised, abolished cytotoxicity of HNE, while oxidized collagen did not reduce cytotoxicity of HNE at all. These preliminary findings indicate that beside direct cytotoxic effects of anticancer therapies consequential oxidative stress and lipid peroxidation modify the microenvironment of CSCs influencing oxidative homeostasis that could additionally act against cancer.
    Źródło:
    Acta Biochimica Polonica; 2010, 57, 2; 165-171
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reactive oxygen species in BCR-ABL1-expressing cells - relevance to chronic myeloid leukemia
    Autorzy:
    Antoszewska-Smith, Joanna
    Pawlowska, Elzbieta
    Blasiak, Janusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1038675.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    chronic myeloid leukemia
    reactive oxygen species
    DNA damage
    DNA repair
    cancer stem cells
    imatinib resistance
    Opis:
    Chronic myeloid leukemia (CML) results from the t(9;22) reciprocal chromosomal translocation producing the BCR-ABL1 gene, conferring growth and proliferation advantages in the CML cells. CML progresses from chronic, often syndrome-free, to blast phase, fatal if not treated. Although the involvement of BCR-ABL1 in some signaling pathways is considered as the cause of CML, the mechanisms resulting in its progression are not completely known. However, BCR-ABL1 stimulates the production of reactive oxygen species (ROS), which levels increase with CML progression and induce BCR-ABL1 self-mutagenesis. Introducing imatinib and other tyrosine kinase inhibitors (TKIs) to CML therapy radically improved its outcome, but TKIs-resistance became an emerging problem. TKI resistance can be associated with even higher ROS production than in TKI-sensitive cells. Therefore, ROS-induced self-mutagenesis of BCR-ABL1 can be crucial for CML progression and TKI resistance and in this way should be taken into account in therapeutic strategies. As a continuous production of ROS by BCR-ABL1 would lead to its self-destruction and death of CML cells, there must be mechanisms controlling this phenomenon. These can be dependent on DNA repair, which is modulated by BCR-ABL1 and can be different in CML stem and progenitor cells. Altogether, the mechanisms of the involvement of BCR-ABL1 in ROS signaling can be engaged in CML progression and TKI-resistance and warrant further study.
    Źródło:
    Acta Biochimica Polonica; 2017, 64, 1; 1-10
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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